Loom shuttle



Tm. 9, 1951 J. J. KAUFMANN, JR

v Loom SHUTTLE Filed Nov. 10, 1949 f n l n JHN .L KAUFMANN .In

Patented Jan. 9, 1951 UNITED `STATES PATENT GFFICE LOOM SIilUT'I'IQl John J. Kaufmann', Jr., Greenville; S. G., assigner to Steel' Heddle Manufacturing Company, Philadelphia, Pa., a corporation of Pennsylvania Application November 10, 1949, lSerial No. 126,480

Claims. l

This invention relates to loomshu-t'tle's, and it relates more particularly to a practical means for adjusting the bobbingripping devices for the purpose of correcting' axial alinementof the bobbin in its relation to the threading block usually provided at theother end-of the shuttlel In the shuttles: used in automatic looms, and particularly those of the weft replenishing type,v the permanenuy located spring gripping jaws which engage the ring's at the butt endl of the bobbin often become worn in use, due to the rough" usage atv the time or the exchangev of the' bobbins in the shuttle, wi'thjthe result that the front end of the boi-)bin `wir-1 often require adjustment thel vertical plane s'othat thelling yarn running' oir 'from the bobbin will be fed properly to the'- threading block which is mounted at the other end of the-shuttle from that in which the'bobb'in gripping devicel islocated. Here'tofore' such adjustment could onlybe" made by disas-V s'c'mblingv the entire gripping device and refitting the-same in the shuttle.

The principal object ofthe present invention is to provide; in a shuttle' of the weft r'epl'enis'hingV type, a practical means for' readily and easily ad'-v justing the gripping mechanism without dismantling the same so that the free end of the bobbin may be brought to the proper location whereby the filling' yarnwill' be' fed properly from the bobbin to the threading block.

A further object of the present invention is to provide, in a loom shuttle,\a device of the char-.

rangement shown in Fig. 1;

Fig. 3 is a View similar to Fig- 1, showing a modied form of the invention;

Fig. 4 is an 'underneath plan view of the arrangement shown in Fig. 3; and

Fig. 5 is an enlarged detail view illustrating certain portions of the device shown in Figs. 3 and 4, the same comprising a section taken on the line 5-5 of Fig. 3.

It should, of course, be understood that the description and drawing herein are illustrative (Cl. 139-207 l merely, and that various modications and changes may be made in the structures disclosed without departing from the spirit of the invention.

Referring to the drawing, as `there shown, the shuttle comprises the usual shuttle body I il, having a central chamber Il therein in which is 1o'- catedY the bobbin I2 which carries the filling yarn laid into the cloth by the shuttle.

'.'lie thread delivery end of the Vshuttlel (not shown) and the threadingfdevce mounted thereinmay beL of any preferred construction.

The end ofthe shuttle shown is provided with al bobbin gripper springl I3 for releasably holding thejvbutt portion I4 of the bobbin I2.

The' gripper spring I3 mayy be of any o f theV ordinary shapes commonly used, having a U'shap`ed shank portion I5 which may bel anchored in the body portion of the shuttle by means of a transverse boltv I6 or in any other preferred manner. n

The shan'k end l5 of the gripper spring i3 is also secured by means of a grip strap I9 come prising a bottom horizontal portion 20 which is located inV the base of the groove or recess ZI provided in the end of the shuttle body and is en-' gaged by the lowerV face of the gripper spring i3. The grip strap I9v is also provided with a top portion 22, the under face of which engages and grips the top face of shank portion i5 of the gripper spring I3 and having the usual inclined portion 23, at the end toward the shuttle cavity, for guid'fV ing" thel butt I4 of the bobbin I2 to the proper position' Within the shuttle so that the' rings I'I, usually provided on theb'utt end I4` of the bobbin I2 will be gripped by the grooves I8 provided in the jaws of the gripper spring I3.

In the form oi the invention shown in Figs. 1 and 2 of the drawing, portions of the bottom portion 20 of the grip strap I9 are punched inwardly as at 24 and threaded whereby the same may be engaged by the threaded portion 25 of an adjusting screw 30 which is mounted therein.

The adjusting screw 3U also has an enlarged head portion 26 which is seated in the base of a groove or recess located below the inner end of the lower portion 20 of the grip strap.

The grip strap I9 is also secured in place by means of a vertically mounted bolt 21, located adjacent the transverse bolt I6 which serves to anchor the gripper spring I3 against longitudinal movement in the shuttle body Il).

The adjusting screw 30 also has, internally arranged, a non-circular cavity 28 adapted to be engaged by a complementally shaped wrench (not shown) and for the purpose of permitting access to said cavity 28 by the wrench, the part of the body portion of the shuttle, which is disposed below the adjusting screw, is provided with an aperture 29 through which the wrench may be inserted.

The manner of use of the invention as above described is as follows:

If either initially, or, in the course of time', it is found that the axis of the bobbin I2 is out of alinement with the threading block (not shown) in the other end of the shuttle, it is only necessary for the purpose of adjusting the same, to insert the wrench through the aperture 29 into the cavity 28 of the adjusting screw 30 and to turn `the same in the proper direction, whereby the grip strap I 9 and consequently the gripper spring I3 will be given a slight angular movement, substantially about the axis provided by the transverse bolt I6 which passes through the shank portion I thereof.

It has been found in practice that a very small amount of adjustment is necessary, in the device of the present invention, by reason of the fact that the angular shifting of the gripper spring I3 is greatly magnified by reason of the relatively greater length of the bobbin I4.

The device shown in Figs. 3 and 4 is substantially similar to that shown in Figs. 1 and 2 with the exception that, in lieu of the struck-in portions of the base part of the grip strap I9 being bent in and threaded as above described for the mounting of the adjusting screw, the base portion of the grip strap is provided with a noncircular aperture 3| in which a nut 32, having its exterior complementally shaped with respect to the aperture, is provided for the mounting of the adjusting screw 30 therein. The nut 32 may have a head portion 33 bearing against the under face of the bottom portion 20 of the grip strap.

The operation of the device shown in Figs. 3, 4 and 5 of the drawing is, of course, the same as that shown in Figs. 1 and 2.

I claim:

l. In a loom shuttle of the weft replenishing type having a bobbin gripper spring mounted therein with a shank portion secured in a recess in the body of the shuttle, a grip strap having top and bottom portions engaging the shank portion of the gripper spring, an adjusting screw mounted in the bottom portion of the grip strap, said adjusting screw adapted, when adjusted, to angularly shift the gripper spring thereby to shift the axis of the bobbin in its vertical plane.

2. In a loom shuttle of the weft replenishing type having a bobbin gripper spring mounted therein with a shank portion secured in a recess in the body of the shuttle, a grip strap having top and bottom portions engaging the shank portion of the gripper spring, an adjusting screw mounted in the bottom portion of the grip strap, said adjusting screw having a head portion bearing against a portion of the shuttle body and adapted, when adjusted, to angularly shift the gripper spring thereby to shift the axis of the bobbin in its vertical plane.

3. In a loom shuttle of the weft replenishing type having a bobbin gripper spring mounted therein with a shank portion secured in a recess in the body of the shuttle, a grip strap having top and bottom portions engaging the shank portion of the gripper spring, an adjusting screw threaded in a struck in part of the bottom portion of the grip strap, said adjusting screw adapted, when adjusted,"v to angularly shift the gripper spring thereby to shift the axis of the bobbin in its vertical plane.

4. In a loom shuttle of the weft replenishing type having a bobbin gripper spring mounted therein with a shank portion secured in a recess in the body of the shuttle, a grip strap having top and bottom portions engaging the shank portion of the gripper spring, a nut mounted in the bottom portion of the grip strap, an adjusting screw threaded in said nut, said adjusting screw adapted, when adjusted, to angularly shift the gripper spring thereby to shift the axis of the bobbin in its vertical plane.

5. In a loom shuttle of the weft replenishing typehaving a bobbin gripper spring mounted therein with a shank portion secured in a recess in the body of the shuttle, a grip strap having REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 955,119 Le Doux et al Apr. 12, 1910 1,784,266 Bahan Dec. 9, 1930 

